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PROCUREMENT OPPORTUNITY

715724483_V2 The Provision of Nuclear Site Safety Justification (NSSJ) Services at HMNB Devonport

Submarine Delivery Agency · Contract award notice on Find a Tender

Tender information last checkedLast checked 25 Sept 2026, 14:52.

Opportunity overview

Description of the Procurement The fundamental aim of the Naval Site Safety Justification (NSSJ) contract is to procure the provision of an integrated Project Management Service (PMS) to support the continued authorisation and safe operation of HM Naval Base (HMNB) Devonport. The contract provides specialist capability to deliver project management, nuclear safety advice, safety case production and maintenance, and Periodic Review of Safety (PRS) activities, under a pro rata model. These services ensure that the Naval Base Commander’s Site Safety Justification documentation remains current, robust, and fully compliant with: • MoD Authorisation Conditions • MoD Naval Nuclear Safety Principles (NNSP) • Applicable Defence Nuclear Safety Regulator (DNSR) standards In addition to technical delivery, the contract supports knowledge transfer and information sharing to strengthen the Authority’s Intelligent Customer (IC) capability. Scope of Services The services to be provided under this contract include, but are not limited to: 1. Nuclear Safety Case Management and Support • Provision of specialist nuclear safety advice reflecting modern civil nuclear practice. • Management, review, and maintenance of the full suite of HMNB Devonport nuclear safety cases and supporting documentation. • Support to the Naval Base Design Authority in ensuring safety justification documentation remains authorised and compliant throughout its lifecycle. 2. Nuclear Authorised Documentation Review Programme (NADRP) Support • Support for documentation production, review, update, and tracking activities using the Nuclear Authorised Documentation Review Programme (NADRP). • Delivery of tasks assigned via NADRP in accordance with programme priorities and Design Authority requirements. • Flexible and reactive support for new documentation tasks driven by the submarine operational programme, including delivery to demanding timelines. 3. Periodic Review of Safety (PRS) Support • Full-time technical support to the PRS Lead, managed through the Design Authority PRS Assistant Head role. • Subject matter review and assessment activity contributing to the successful delivery of the Naval Base PRS programme. 4. Intelligent Customer (IC) Support • Independent IC support to the Design Authority Safety Justification Delivery Manager (SJDM). • Provision of an experienced safety engineer to assess NSSJ documentation during production, review, and approval stages. • Assurance that IC activities remain independent from document authorship and production. 5. Continuous Improvement and Knowledge Transfer • Support to the Naval Base in fostering a culture of continuous improvement in nuclear safety management. • Knowledge sharing and mentoring to enhance internal capability and resilience within the Authority. Delivery Context and Experience Requirements The service provider is required to bring a high level of knowledge and experience in nuclear safety case management, with a strong understanding of the MOD environment. This includes experience of operating within the challenges of balancing a demanding military operational programme with the stringent requirements of nuclear safety regulation. The provider is expected to work within established HMNB Devonport nuclear safety management arrangements while applying relevant external experience and best practice to enhance safety performance.

Awarded to

Amounts belong to published awards or contracts. Where several suppliers share one value, it is labelled as shared and is not a supplier-specific allocation.

Nesc Limited

Matched by exact name
Published award value
£4m
Awarded
19 Aug 2026
Award ID
1
Status
active
Identifier
GB-PPON PNHN-3242-RJHY
Location
Plymouth, UKK41, PL6 8BX, United Kingdom

Classification

No classification was supplied.

Lots

  • Lot 1Value not stated

Documents and notices

Published notice details

Additional information from the published procurement release. Fields appear only when supplied by the source; check the original notice and tender documents before acting.

Scope, procedure and submissions

Id
715724483_V2
Status
complete
Procurement Method
open
Procurement Method Details
Competitive flexible procedure

Legal basis

Id
2023/54
Scheme
UKPGA

Special regime

defenceSecurity

Lots and requirements

Entry 1
Id
1
Status
complete

Buyer, suppliers and contacts

Organisation 1
Name
Submarine Delivery Agency
Id
GB-PPON-PBHX-4625-LVPD

Identifier

Scheme
GB-PPON
Id
PBHX-4625-LVPD

Address

Street Address
HMNB Devonport
Locality
Plymouth
Postal Code
PL2 2BG
Country
GB
Country Name
United Kingdom
Region
UKK41

Contact

Roles

buyer

Details

Classifications

Entry 1
Scheme
UK_CA_TYPE
Id
publicAuthorityCentralGovernment
Description
Public authority - central government
Organisation 2
Name
Nesc Limited
Id
GB-PPON-PNHN-3242-RJHY

Identifier

Scheme
GB-PPON
Id
PNHN-3242-RJHY

Address

Street Address
Plymouth Science Park, 1 Davy Road
Locality
Plymouth
Postal Code
PL6 8BX
Country
GB
Country Name
United Kingdom
Region
UKK41

Contact

Roles

supplier

Details

Scale
sme
Vcse
No
Public Service Mission Organization
No
Sheltered Workshop
No

Award information

Award 1
Id
1
Title
715724483_V2 The Provision of Nuclear Site Safety Justification (NSSJ) Services at HMNB Devonport
Status
active
Date
20 Aug 2026, 00:00
Main Procurement Category
services
Above Threshold
Yes
Has Renewal
Yes
Has Options
Yes
Assessment Summaries Date Sent
21 Aug 2026, 00:00

Items

Item 1
Id
1
Related Lot
1

Additional Classifications

Entry 1
Scheme
CPV
Id
79417000
Description
Safety consultancy services

Delivery locations

Entry 1
Region
UK
Country
GB
Country Name
United Kingdom

Value

Including VAT
4,755,632.4
Amount
3,963,027.01
Currency
GBP

Suppliers

Supplier 1
Id
GB-PPON-PNHN-3242-RJHY
Name
Nesc Limited

Contract period

Starts
1 Nov 2026, 00:00
Ends
31 Oct 2029, 23:59
Max Extent Date
31 Oct 2032, 23:59

Renewal

Description
Option Years

Options

Description
Option years 4 and option year 5

Related lots

1

Documents

Entry 1
Id
079858-2026
Document Type
awardNotice
Notice Type
UK6
Description
Contract award notice on Find a Tender
Published
21 Aug 2026, 12:07
Format
text/html

Milestones

Entry 1
Id
1
Type
futureSignatureDate
Due
21 Sept 2026, 23:59
Status
scheduled

Recorded locations

  • Buyer location · Plymouth · UKK41 · PL2 2BG · United Kingdom

Notice and amendment history

4 published notice versions reviewed by ProcuraAxis.

4 VERSIONS
  1. 011875-2026Pipeline notice on Find a Tender ·
  2. 033169-2026Tender notice on Find a Tender ·
  3. 034011-2026Tender notice on Find a Tender ·
  4. 079858-2026Contract award notice on Find a Tender ·